1683540645 has 16 divisors (see below), whose sum is σ = 2708717760. Its totient is φ = 892870784.

The previous prime is 1683540641. The next prime is 1683540679. The reversal of 1683540645 is 5460453861.

It is a cyclic number.

It is not a de Polignac number, because 1683540645 - 2² = 1683540641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1683540597 and 1683540606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1683540641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310824 + ... + 316193.

It is an arithmetic number, because the mean of its divisors is an integer number (169294860).

Almost surely, 2^1683540645 is an apocalyptic number.

1683540645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1683540645 is a deficient number, since it is larger than the sum of its proper divisors (1025177115).

1683540645 is a wasteful number, since it uses less digits than its factorization.

1683540645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627204.

The product of its (nonzero) digits is 345600, while the sum is 42.

The square root of 1683540645 is about 41030.9717774269. The cubic root of 1683540645 is about 1189.6189361997.

The spelling of 1683540645 in words is "one billion, six hundred eighty-three million, five hundred forty thousand, six hundred forty-five".